设∫f(x)dx=F(x)+C,则∫xf(x2)dx=( )
设(d/dx)f(x)=g(x),h(x)=x2,则(d/dx)f[h(x)]等于:()
设4/(1-x2)·f(x)=d/dx[f(x)]2,且f(0)=0,则f(x)等于:()
设f(x)在积分区间上连续,则sinx?[f(x)+f(-x)]dx等于:()
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